... screen TF card extension MP4+speaker+voice recording +FM+USB flash Disk Built-in microphone MP4 player1. 2.8 ... , WMA, WMV, ASF and WAV11. Supports AMV video file, through AMV convert tool, files (AVI, ASF, WMV ... DAT and VOB) can be converted to AMV file promptly 12. Supports firmware upgrade 13. Supports browse ... , GIF picture and E-book14. Supports TXT file browse15. Built-in Li ion battery16. Built-in ...